单晶MgO纳米带的生长特性和发光性能

李明吉 王秀锋 李红姬 吴小国 曲长庆 杨保和

引用本文: 李明吉, 王秀锋, 李红姬, 吴小国, 曲长庆, 杨保和. 单晶MgO纳米带的生长特性和发光性能[J]. 无机化学学报, 2013, 29(6): 1199-1205. doi: 10.3969/j.issn.1001-4861.2013.00.190 shu
Citation:  LI Ming-Ji, WANG Xiu-Feng, LI Hong-Ji, WU Xiao-Guo, QU Chang-Qing, YANG Bao-He. Growth Characteristics of Single-Crystalline MgO Nanobelts and Its Photoluminescence Properties[J]. Chinese Journal of Inorganic Chemistry, 2013, 29(6): 1199-1205. doi: 10.3969/j.issn.1001-4861.2013.00.190 shu

单晶MgO纳米带的生长特性和发光性能

  • 基金项目:

    国家自然科学基金(No.50972105) (No.50972105)

    天津市自然科学基金(No.10SYSYJC27700) (No.10SYSYJC27700)

    国家高技术研究发展计划(863)(No.2013AA030801)资助项目。 (863)(No.2013AA030801)

摘要: 本文采用直流电弧等离子体喷射化学气相沉积法(DC Arc Plasma Jet CVD),在氢气和氩气的高温等离子体作用下直接分解硝酸镁,在Mo衬底上制备了单晶MgO纳米带,并采用SEM、TEM及XRD等测试手段进行了形貌与结构表征,研究了生长时间对MgO纳米带形貌的影响。结果表明,生长时间为0.5 min时,生长出顶部带有Mo纳米颗粒的“蝌蚪状”MgO纳米带,而整个纳米结构被较多的非晶MgO覆盖;当生长时间增加到2 min时,顶部的Mo纳米颗粒几乎脱落,同时长出若干个纳米带,形成“树枝状”;生长时间进一步增加到5 min时,形成完整的“带状”,其宽度约30~50 nm;而生长时间达到12 min时,纳米带又转变为“棒状”。机理分析表明,Mo催化VLS生长模式和VS生长模式共同作用下生长了MgO纳米带。另外,通过FTIR谱结合PL谱分析了缺陷及其引起的光致发光性能。由于MgO纳米带存在低配位氧离子(OLC2-)空位等结构缺陷,具有紫蓝发光特性,而随着生长时间的增加,结构缺陷变少,随之紫蓝发射峰强度变弱。本文首次采用该方法制备了单晶MgO纳米带,该方法工艺简单,生长速率快,是非常经济、有效和环境友好的方法。

English

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  • 收稿日期:  2012-01-04
  • 网络出版日期:  2013-03-05
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